<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper" v-for="item of hot" :key="item.id" @click="handleCityClick(item.name)">
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <!--  key为A,B,C...  -->
      <div class="area" v-for="(item, key) of cities" :key="key" :ref="key">
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div class="item border-bottom"  v-for="innerItem of item" :key="innerItem.id" @click="handleCityClick(innerItem.name)">
            {{innerItem.name}}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>
<script>
  import Bscroll from 'better-scroll'
  import {mapState,mapMutations} from 'vuex'

  export default {
    mounted() {
      this.scroll = new Bscroll(this.$refs.wrapper)
    },
    props: {
      cities: {
        type: Object,
        default() {
          return {}
        }
      },
      hot: {
        type: Array,
        default() {
          return []
        }
      },
      letter: String
    },
    computed: {
      ...mapState({
        currentCity: 'city'
      })
    },
    methods: {
      handleCityClick(city) {
        /*this.$store.dispatch('changeCity', city)*/
        /*this.$store.commit('changeCity', city)*/
        this.changeCity(city)
        this.$router.push('/')
      },
      ...mapMutations(['changeCity'])
    },
    watch: {
      letter() {
        if(this.letter) {
          const element = this.$refs[this.letter][0]
          this.scroll.scrollToElement(element)
        }
      }
    }
  }
</script>

<style scoped lang="stylus">
  @import '~styles/varibles.styl'
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
     border-color: #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    position: absolute
    overflow: hidden
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    .title
      line-height: .54rem
      background: #eee
      padding-left: .2rem
      color: #666
      font-size: .26rem
    .button-list
      padding: .1rem .6rem .1rem .1rem
      overflow: hidden
      .button-wrapper
        float: left
        width: 33.3%
        .button
          text-align: center
          margin: .1rem
          border: .02rem solid #ccc
          padding: .1rem 0
          border-radius: .06rem
    .item-list
      .item
        line-height: .76rem
        padding-left: .2rem
</style>
